Motorola Corporation

Blackberry Corporation

Randall Scott Fraser

Joseph Patino

Charles R Ruelke

George C Anderson

Roberto Gautier

Andrew F Burton

Jay Robert Spoto

Alexander Rodriguez

Tam-Thanh C Buu

In some aspects, a portable electronic device having a slidable upper housing and rear housing movable between an open position and a closed position, and a gain adjustment module. The gain adjustment module reduces the RF energy produced by the portable electronic device when the device is in the open position to ensure that the portable electronic device complies with Hearing Aid Compatibility (HAC) standards.

Electronic device including automatic gain adjustment for hearing aid compatibility

Wireless communications devices, such as cellular telephones (), include an integrated camera () and process image data captured by that camera () to determine desired device illumination levels. A controller () within the wireless communications device () causes an image to be captured by the integrated camera (). The captured image data is processed to determine approximate ambient light levels. A level of device illumination, such as provided by a display backlight () and a keypad backlight () is controlled based upon the approximate ambient light levels.

Multi-function device illumination control system and method

The invention concerns a method () and a system () for charging a battery (). The method includes the steps of determining () a charge termination point for the battery, in which the charge termination point produces a charge on the battery that is less than an initial maximum charging capacity of the battery, and charging () the battery using the charge termination point for at least a portion of the charge cycles of the battery. The method reduces at least in part the variation of battery capacity over the cycle life of the battery.

Method and system for charging a battery to a point less than initial maximum capacity

An apparatus () having a portable power source () can make use of a plurality of differing charge depleted threshold values (and, in a preferred embodiment, corresponding visual charge-remaining indicators) to determine what level of charge remains in the portable power source (). This in turn permits the recharging advice as suggested by the visual indicator to better track and reinforce the ordinary recharging behaviors of a given user. So configured, the total lifetime of the portable power source may be extended while also ensuring that the portable power source will be fully charged upon completion of each charging cycle.

Method and apparatus for use with a portable power source

A system for verification of a battery () includes the battery () and a device (). The battery () includes a memory device () for storing an identification number and a verification number. The verification number is generated by applying a key to the identification number. The device () is coupled to the battery () and includes a device memory () for storing the key and a microprocessor () for verifying the identification number of the battery () by applying the key to the verification number.

System and method for battery verification

A radio receiver (10) comprises a plurality of stages and means for selectively adjusting the stages (16, 18, and 22), as a function of the received signal strength to reduce intermodulation distortion. In still another aspect of the invention, a receiver determines the signal strength of a received signal and uses this information to selectively control stages of the receiver in order to reduce the receiver's current drain.

Radio receiver providing reduced intermodulation distortion

A crystal filter network comprises at least one variable impedance network (103a, 103b), at least one crystal filter (103c), and a control circuit (110). Each variable impedance network (103a, 103b) has a control terminal, a first terminal (37, 39), and a second terminal (38, 40) for connecting a first impedance (113) coupled to the first terminal (37), to a second impedance coupled to the second terminal (38). The crystal filter (103c) is coupled to at least one of the first and second terminals. Coupled to the control terminal, the control circuit (110) electrically varies (V.sub.1 and V.sub.2) the variable impedance network (103a, 103b) to provide a predetermined impedance characteristic to the crystal filter network (103c).

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Plantation, FL, United States of America

Randall Scott Fraser